<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isOk" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color:lightgreen;"
          ></i>
          <i class="el-icon-error" style="color:red;" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            size="mini"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope"
          ><el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            @click="showEditCateDialog(scope.row)"
            >编辑</el-button
          >
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="removeCate(scope.row.cat_id)"
            >删除</el-button
          ></template
        >
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total,sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 主体内容 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类:">
          <el-cascader
            style="width:100%;"
            clearable
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChange"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <!-- 尾部按钮区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑分类对话框 -->
    <el-dialog
      title="编辑分类"
      :visible.sync="editCateDialogVisible"
      width="50%"
      @close="editCateDialogClosed"
    >
      <!-- 主体内容 -->
      <el-form
        :model="editCateForm"
        :rules="editCateFormRules"
        ref="editCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <!-- 尾部按钮区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import message from '../../utils/message'
export default {
  name: 'Cate',
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      //商品分类的数据列表
      cateList: [],
      total: 0,
      columns: [
        { label: '分类名称', prop: 'cat_name' },
        {
          label: '是否有效',
          type: 'template',
          template: 'isOk'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_pid: 0,
        cat_name: '',
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      },
      selectedKeys: [],
      editCateDialogVisible: false,
      editCateForm: {},
      editCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    async getCateList() {
      let res = await this.$http.get('/categories', {
        params: this.queryInfo
      })
      if (res.meta.status === 200) {
        this.cateList = res.data.result
        this.total = res.data.total
        this.pageNum = res.data.pagenum
        this.pageSize = res.data.pagesize
        message('success', '获取商品分类数据列表成功!')
      } else {
        message('error', '获取商品分类数据列表失败!')
        return false
      }
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog() {
      this.addCateDialogVisible = true
      this.getParentCateList()
    },
    async getParentCateList() {
      let res = await this.$http.get('/categories', {
        params: {
          type: 2
        }
      })
      if (res.meta.status === 200) {
        this.parentCateList = res.data
        message('success', '获取父级分类数据成功!')
      } else {
        message('error', '获取父级分类数据失败!')
        return false
      }
    },
    parentCateChange() {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async valid => {
        if (valid) {
          let res = await this.$http.post('/categories', this.addCateForm)
          if (res.meta.status === 201) {
            this.addCateDialogVisible = false
            this.getCateList()
            message('success', '添加分类成功!')
          } else {
            message('error', '添加分类失败!')
            return false
          }
        } else {
          return false
        }
      })
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    async showEditCateDialog(cate) {
      this.editCateDialogVisible = true
      let res = await this.$http.get(`/categories/${cate.cat_id}`)
      if (res.meta.status === 200) {
        this.editCateForm = res.data
        message('success', '查询分类信息成功!')
      } else {
        message('error', '查询分类信息失败!')
        return false
      }
    },
    async editCate() {
      let res = await this.$http.put(`categories/${this.editCateForm.cat_id}`, {
        cat_name: this.editCateForm.cat_name
      })
      if (res.meta.status === 200) {
        this.getCateList()
        this.editCateDialogVisible = false
        message('success', '更新分类信息成功!')
      } else {
        message('error', '更新分类信息失败!')
        return false
      }
    },
    editCateDialogClosed() {
      this.$refs.editCateFormRef.resetFields()
    },
    async removeCate(id) {
      let confirmResult = await this.$confirm(
        '此操作将永久删除该分类, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(error => error)
      if (confirmResult === 'confirm') {
        let res = await this.$http.delete(`categories/${id}`)
        if (res.meta.status === 200) {
          this.getCateList()
          message('success', '删除分类信息成功!')
        } else {
          message('error', '删除分类信息失败!')
          return false
        }
      } else {
        message('info', '已取消了删除!')
        return false
      }
    }
  },
  mounted() {
    this.getCateList()
  }
}
</script>

<style scoped lang="less">
.zk-table {
  margin-top: 15px;
}
</style>
